General Information |
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Distribution | A genus of about 1,120 species from the Old World tropics.
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Habit
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Shrubs or trees, usually glabrous or sometimes with multicellular hairs.
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Leaves
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Leaves opposite or rarely ternate, petiolate; blade chartaceous to coriaceous, pinnately veined, usually with a submarginal vein, glandular punctate.
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Flowers
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Inflorescences 1‒3-flowered or flowers numerous in terminal, axillary, or cauliflorous, usually paniculate, umbellate, racemose, or cymose inflorescences; bracts and bracteoles caducous. Flowers with hypanthium usually tapering to a pseudopedicel, apex extended beyond ovary into a rim; sepals (3)4‒5(6), distinct, borne on the hypanthium rim; petals (3)4‒5(6), borne on the hypanthium rim, often obovate, usually glandular dotted, distinct and spreading or coherent and forming a calyptra; nectary disc on distal surface of hypanthium, thin or cushionlike; stamens numerous in 1 to several series, borne on inner surface or margin of hypanthium rim, usually strongly incurved in bud, filaments distinct or connate into bundles; ovary inferior, 2(‒4)-locular, ovules numerous, spreading from placenta.
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Fruit
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Fruit a berry, subglobose, ellipsoid, pear-shaped, or subcylindrical, pericarp thick and fleshy, leathery, or brittle.
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Seeds
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Seeds 1(‒6), seed coat loosely coherent to pericarp, cotyledon faces distinct, intercotyledonary inclusion absent.
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Notes
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The name is derived from the Greek prefix syn- or sys-, together, and the Greek zygon, yolked, in reference to the coherent petals that form a calyptra in some species.
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Contributor
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Nancy Khan
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